{('boolean'): <class 'foolscap.slicers.bool.BooleanUnslicer'>,
 ('decimal'): <class 'foolscap.slicers.decimal_slicer.DecimalUnslicer'
>,
 ('dict'): <class 'foolscap.slicers.dict.DictUnslicer'>,
 ('immutable-set'): <class 'foolscap.slicers.set.FrozenSetUnslicer'>,
 ('list'): <class 'foolscap.slicers.list.ListUnslicer'>,
 ('none'): <class 'foolscap.slicers.none.NoneUnslicer'>,
 ('reference'): <class 'foolscap.slicer.ReferenceUnslicer'>,
...

BananaUnslicerRegistry

Value:

{('add-vocab'): <class 'foolscap.slicers.vocab.AddVocabUnslicer'>,
 ('set-vocab'): <class 'foolscap.slicers.vocab.ReplaceVocabUnslicer'>}